Tait TM8100 Installation Manual page 20

Table 2.2 Auxiliary connector (radio)—pins and signals
Pinout Pin Signal name
12 AUX GPI1
B
5 AUX GPI2
J
C
4 AUX GPI3
1)
D
1!
E
10 AUX GPIO4
1@
F
2 AUX GPIO5
1#
G
9 AUX GPIO6
1$
H
1%
1 AUX GPIO7
I
11 AUX TXD
rear view
3 AUX RXD
7 AUD TAP IN
13 AUD TAP OUT Programmable tap point out of the Rx or
14 AUX MIC AUD Auxiliary microphone input.
6 RSSI
8 +13V8 SW
15 AGND
Table 2.3 Auxiliary connector—input levels
Parameter
min.
Input low level:
All inputs
AUX_GPI2
Input high level:
All inputs 1.7
AUX_GPI2 V –1.5
s
AUX_GPI3 2.6
Safe DC input limits:
AUX_GPI1-3 –0.5
AUX_GPIO4-7 –0.5
AUX_RXD –25V
3
AUX_TXD –10
1. The radio will tolerate a supply voltage range of 10.8V to 16.0V at the radio.
2. For more information on hardware links refer to the service manual.
3. This output is protected against accidental input to the limits specified.
20 Installing the Radio
Description
General purpose digital input.
Programmable function
General purpose input (ignition sense)
Programmable function and direction
Pads available to fit a higher power driver
transistor on GPIO4 line
Asynchronous serial port - Transmit data Digital, 3.3V CMOS
Asynchronous serial port - Receive data
Programmable tap point into the Rx or Tx
audio chain. DC-coupled
Tx audio chain. DC-coupled
Electret microphone biasing provided.
Dynamic microphones are not supported
Analog RSSI output
Switched 13.8V supply. Supply is
switched off when radio body is switched
off
Analog ground
1
Voltage
Test method and conditions
max. units
0.7 V No hardware links fitted
V –4 V LK3 fitted.
s
V No hardware links fitted2.
V LK3 fitted.
V LK1 and/or 2 fitted.
V +0.5 V
s
V +0.5 V
s
V +0.5 V
s
V +0.5 V
s
Signal type
Digital, 3.3V CMOS.
3.3V levels. Protected for
+13.8V (refer to
Digital, 3.3V CMOS input;
open collector output with
pullup
Digital, 3.3V CMOS
Analog
Analog
Analog
Analog
Power
Ground
Comments
2
. Includes AUX_GPI3 with LK1/2 fitted.
Configured as emergency power sense
input.
Configured as emergency power sense
input.
Configured as power sense input.
The input current must not exceed
±
50mA. This is the rating of the
clamping diodes.
TM8100/TM8200 Installation Guide
© Tait Electronics Limited July 2006
Table 2.3).